Sharp MD-MS721BL, Service Manual

MD-MS722/C/W/MS721W

– 3 –

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO
THE OPERATION MANUAL.

    General

Power source:

DC 3.6 V (rechargeable lithium-ion

(MS722/MS722C)

battery x 1)

DC 5 V (AC adaptor)
AC 120V, 60 Hz
DC 3.4V: Battery case
               (commercially available, "AA"

size, alkaline battery x 1)

DC 4.5V: Separately available car adaptor,

AD-CA20X

               (for cars with a 12-24V DC

negative earth electrical system)

Power source:

DC 3.6 V (rechargeable lithium-ion

(MS722W/MS721W)

battery x 1)

DC 5 V (AC adaptor)
AC 110 - 240V, 50/60 Hz
DC 3.4V: Battery case
               (commercially available, "AA"

size, alkaline battery x 1)

DC 4.5V: Separately available car adaptor,

AD-CA20X

               (for cars with a 12-24V DC

negative earth electrical system)

Power consumption:

7 W (AC adaptor)

(MS722/MS722C)
Power consumption:

0.15A (AC adaptor)

(MS722W/MS721W)
Output power:

RMS; 20 mW (10 mW + 10mW)
(0.2% T.H.D.)

Charging time:

Approx. 3 hours
(When using the AC adaptor included
with the unit)

Battery life:

The continuous recording time is for analogue input when the volume
level is set to "VOL 0".
The continuous play time shows the value when the volume level is
set to "VOL 15".
The above values are the standard values when the unit is charged
and used at an ambient temperature of 20

o

C.

The operating time when using alkaline batteries may be different,
depending on the type and manufacturer of the batteries, and on the
operating temperature.

Input sensitivity:

Output level:
(MS722/MS722C)

Output level:
(MS722W/
MS721W)

Dimensions:

Width: 3-7/16" (87.0 mm)
Height: 1-1/16" (26.7 mm)
Depth: 3-1/4" (81.5 mm)

Weight:

0.49 lbs. (220 g) with rechargeable
battery

Input socket:

Line/optical digital, microphone
(powered by the main unit)

Output socket:

Headphones (impedance: 19 ohms)/

(MS722/MS722C)

remote control unit

Output socket:

Earphones (impedance: 32 ohms)/

(MS722W/MS721W)

remote control unit

    MiniDisc Recorder

Type:

Portable MiniDisc recorder

Signal readout:

Non-contact, 3-beam semi-coductor
laser pick-up

Audio channels:

Stereo 2 channels/monaural (long-
play mode) 1 channel

Frequency response:

20 - 20,000 Hz (

±

 3 dB)

Rotation speed:

Approx 400 - 900 rpm

Error correction:

ACIRC (Advanced Cross Interleave
Reed-Solomon Code)

Coding:

ATRAC (Adaptive TRansform
Acoustic Coding), 24-bit computed
type

Recording method:

Magnetic modulation overwrite
method

Sampling frequency:

44.1 kHz (32 kHz and 48 kHz signals
are converted to 44.1 kHz, and then
recorded.)

Wow and flutter:

Unmeasurable (less than 

±

0.001%

W.peek)

SPECIFICATIONS

When using the
rechargeable battery (fully
charged) included with the
unit

When using one,
commerically available,
high capacity, "AA" size,
alkaline batteries (in the
battry case)

When using one,
commercially available,
high capacity, "AA" size
batteries with the recharge-
able battery (fully charged)

Continuous recording:

Approx. 8 hours

Continuous recording:

Approx. 3 hours

Continuous recording:

Approx. 11 hours

Continuous play:

Approx. 10 hours

Continuous play:

Approx. 6 hours

Continuous play:

Approx. 16 hours

Recording level

Reference input level Input impedance

MIC H

0.25 mV

10 k ohms

MIC L

2.5 mV

10 k ohms

LINE

100 mV

20 k ohms

Specifications for this model are subject to change without prior
notice

Headphones

—

10 mW +

16 ohms

10 mW

LINE

300 mV

—

10 kohms

(-12dB)

Maximum

output level

Specified

output

Load

impedance

Headphones

—

10 mW +

32 ohms

10 mW

LINE

300 mV

—

10 kohms

(-12dB)

Maximum

output level

Specified

output

Load

impedance